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Thursday, October 01, 2009

RADIATION EFFECTS & UR MOBILE - QUANTIFIED

1. We all hear about how the radiations emitted from our mobiles keep effecting us on the wrong side……but what are the specifications laid down for quantification of these effecting variables? What are these variables ?How much do they effect us? Do separate mobile handsets effect us in different ways?Are their any safe limits in these? What are the available standards?

2. The first and the most significant variable is the Specific absorption rate (SAR) , a measure of the rate at which energy is absorbed by the body when exposed to a radio frequency (RF) electromagnetic field. It is defined as the power absorbed per mass of tissue and has units of watts per kilogram. SAR is usually averaged either over the whole body, or over a small sample volume (typically 1 g or 10 g of tissue). The value cited is then the maximum level measured in the body part studied over the stated volume or mass.

3. SAR is used to measure exposure to fields between 100 kHz and 10 GHz. It is commonly used to measure power absorbed from mobile phones and during MRI scans. Few specifications of good and bad mobiles as found rated from TOI site at their INFOTECH tab are shown below with details :

SAMSUNG IMPRESSION : GOOD

Maximum radiation: 0.35 Watts per kilogram (W/kg) (based on reported radiation level when held up to your ear)

SAR when held at the ear: 0.35 W/kg

SAR when worn on the body: 0.83 W/kg

MOTOROLA RAZR V8 : GOOD

Maximum radiation: 0.36 W/kg

SAR when held at the ear: 0.36 W/kg

SAR when worn on the body: 0.86 W/kg

SAMSUNG SGH-T229 : GOOD

Maximum radiation: 0.38 W/kg

SAR when held at the ear: 0.38 W/kg

SAR when worn on the body: 0.69 W/kg

MOTOROLA MOTO VU204 : WORST

Maximum radiation: 1.55 W/kg

SAR when held at the ear: 1.55 W/kg

SAR when worn on the body: 0.58 W/kg

BLACKBERRY CURVE 8330 : WORST

Maximum radiation: 1.54 W/kg

SAR when held at the ear 1.54 W/kg

SAR when worn on the body 0.99 W/kg

4. United States: The FCC requires that phones sold have a SAR level at or below 1.6 watts per kilogram (W/kg) taken over a volume of 10 gram of tissue while European Union specify SAR limits within 2 Watts/kg taken over a volume of 10 gram

5. So next times some one asks you or even mentions about radiation effect of mobiles on health….just make the aspect more clear of weather of not his/her mobiles in meeting the S.A.R norms or not?

6. Thanks Wiki,Tech gadgets and TOI.

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